﻿#pragma once
#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<assert.h>
using namespace std;

namespace jyz
{
	class string
	{
	public:
		typedef char* iterator;
		typedef const char* const_iterator;
		iterator begin();
		iterator end();
		const_iterator begin() const;
		const_iterator end() const;

		string(const char* str = "");
		string(const string& s);
		//string& operator=(const string& s);
		string& operator=(string tmp);
		~string();
		const char* c_str() const;

		size_t size() const;
		char& operator[](size_t pos);
		const char& operator[](size_t pos) const;

		void reserve(size_t n);
		void push_back(char ch);
		void append(const char* str);

		string& operator+= (const char ch);
		string& operator+= (const char* str);

		void insert(size_t pos, const char ch);
		void insert(size_t pos, const char* str);
		void erase(size_t pos = 0, size_t len = npos );

		size_t find(char ch, size_t pos = 0);
		size_t find(const char* str, size_t pos = 0);

		void swap(string& s);
		string substr(size_t pos = 0, size_t len = npos);

		void clear();

		bool operator< (const string& s) const;
		bool operator<= (const string& s) const;
		bool operator> (const string& s) const;
		bool operator>= (const string& s) const;
		bool operator== (const string& s) const;
		bool operator!= (const string& s) const;
		
	private:
		char* _str;
		size_t _size;
		size_t _capacity;

		const static size_t npos;
	};
	ostream& operator<< (ostream& out, const string& s);
	istream& operator>> (istream& in, string& s);
}